“It,s hard for me to get up the
1
with my bag because its so heavy,”said Rick Hammond,
2
11yearold student in the US.
Rick is among the students who have
3
backpacks(背包)with two straps(带子)to carry them,
4
a number of other students choose
rolling backpacks.
But even with rolling backpacks,
5
up stairs and buses with them is
6
a problem for kids.Many of them have hurt their knees,backs or necks because of heavy school bags.
But how much is too
7
?Experts say students should carry
8
more than 10 to 15 percent of their own body weight.
Scott Bautch,a Wisconsin
9
doctor,said kids under 4th grade should
10
with 10 percent.But it,s also important that older kids don,t go
11
percent,because their bones are still growing.
Bautch explained that there are other injuries caused by backpacks.“Kids are
12
their balance and falling down with these backpacks,”he said.
【福建省长泰一中2017届高考英语一轮复习单元精练:人教版必修5 Unit 1】相关文章:
★ 2017届江苏省淮安市新马中学高考牛津译林版英语一轮复习活动单:模块7 unit 4《Public transport》
★ 【人教版】2014届高考英语一轮复习指导考点针对练:必修1 unit3《Travel journal》
★ 【人教版】2014届高考英语一轮复习指导考点针对练:选修7 unit2《Robots》
★ 天津市武清区杨村第四中学2016届高考英语一轮复习语法专题五《状语从句》课件外研版
★ 辽宁省辽阳市2014高考英语单项选择一轮(暑假)训练(3)附答案
★ 【北京专用】2014届高考英语一轮复习方案课时作业:选修7 Unit 3 Under the sea
★ 2017届高考英语二轮复习大题冲关秘籍阅读理解七选五:考纲解读(含解析)
★ 四川省2016届高考英语一轮复习课时作业(43) Module 1 Deep South 外研版选修8
★ 四川省2016届高考英语一轮复习课时作业(27) Module 3 Adventure in Literature and the Cinema 外研版必修5
★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (40)
最新
2017-04-24
2017-04-24
2017-04-24
2017-04-24
2017-04-21
2017-04-21